An area of the retina that contains only cones and is the site of sharpest vision is the outer segment. optic disc. fovea. tapetum lucidum. inner segment.

An area of the retina that contains only cones and is the site of sharpest vision is the
outer segment.
optic disc.
fovea.
tapetum lucidum.
inner segment.

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Answer

•  fovea. 
  Explanation:
  Fovea is a region in the humans’ retina whereby there is highest vision. At the fovea, the cones are present while rods are absent. The fovea is responsible in carrying out sharp central vision necessary for human activities such as reading, diving and so on. Presence of cons in the fovea raises the resolution of this region relative to other regions.